TY - JOUR
T1 - Contribution of soft zone-center transverse optical phonons to the shift and width of sharp line electronic transitions in ferroelectrics
AU - Laulicht, I.
AU - Huber, D. L.
PY - 1984/4/23
Y1 - 1984/4/23
N2 - The contribution of soft zone-center transverse optical phonons to the shift and width of sharp line electronic transitions in ferroelectrics is assessed. It is pointed out that the soft modes may be important for transitions involving ions at sites lacking inversion symmetry, where a direct coupling to the displacement field is allowed, but are probably not important for ions at centro-symmetric sites where the coupling to the long-wavelength modes is through the strain field.
AB - The contribution of soft zone-center transverse optical phonons to the shift and width of sharp line electronic transitions in ferroelectrics is assessed. It is pointed out that the soft modes may be important for transitions involving ions at sites lacking inversion symmetry, where a direct coupling to the displacement field is allowed, but are probably not important for ions at centro-symmetric sites where the coupling to the long-wavelength modes is through the strain field.
UR - http://www.scopus.com/inward/record.url?scp=48749134366&partnerID=8YFLogxK
U2 - 10.1016/0375-9601(84)90432-8
DO - 10.1016/0375-9601(84)90432-8
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AN - SCOPUS:48749134366
SN - 0375-9601
VL - 101
SP - 514
EP - 516
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 9
ER -